Wheel mounting and demounting press



LMBZWBS Aprifl 2, 1929. w. H. DERBYSHIRE, JR

WHEEL MOUNTING AND DEMOUNTING PRESS Filed Dec. 23, 1926 3 Sheets-Sheet Milk W 1929- 'w. H. DERBYSHlRE, JR 11,77,95

WHEEL MOUNTING AND DEMOUNTElNG PRESS Filed Dec. 23, 1926 3 Sheets-Sheet 2 Aprifl z, 3929. w. H. DERBYSHIRE. JR 4 39749191195 7 WHEEL MOUNTING AND DEMOUNTING PRESS iiled Dec. 25, 1926 s Sheets-Sheet Patented Apr. 2, 1929. 2

NETE STATE,

'1 I tweet eater Pris,

WILLIAIE HERBERT DERBY HIRE, 33., OF CHAMBERSBURG, PENNSYLVANIA, AS- SIGNOR TO OHAMBERSBURG ENGINEERING COMPANY, OIE CI-IAMBERSBURG, PENN- SYLVANIA, A. CORPORATION OF PENNSYLVANIA.

WHEEL MOUNTING- AND DEMOUN TIN G PRESS.

Application filed December 23, 1926. Serial No. 156,696.

This invention relates to improvements in machines for mounting and demounting the wheels of railroad and like cars upon and from their axles. It is the principal object of the present invention to provide a single machine in improved form capable of carrying out both the mounting and demounting operations.

In the attached drawings, in which I have illustrated a machine made in accordance with the present invention:

Figure 1 is a front elevation of the, machine;

Fig. 2 is a plan view of the machine;

Fig. 3 is an end elevation of the machine;

Fig. 4c is a detached perspective of one of the wheel mounting yokes;

Fig. 5 is a view in perspective of one of the yoke stops, and

Figs. 6 and 7 are respectively diagram matic elevations illustrating the operation of the machine.

lVith reference to the drawings, the machine comprises a pair of end beams, 1 and 2 respectively, and an intermediate beam 3, all rigidly connected by means of tie rods 4 and 5. The beam 1 has at its inner face an abutment or head 6, and in back of this head a power cylinder 7 in which operates a plunger (not shown) carrying a stem 8 which projects forwardly through an aperture 9 in the head 6. The plunger is actuated from a pressure source hereinafter described, and means is provided in the form of a valve 10, for directing the pressure to either end of the cylinder to advance or retract the plunger as required.

The beam 2 comprises a cylinder 11 in which operates a ram. On the projecting end of this ram is a head 12, and the ram may be advanced in the cylinder towards the intermediate beam 3 by means of hydraulic or other pressure applied by suitable means to the cylinder. Means, such as a counterweight 13, is provided for retracting the ram in the cylinder.

The intermediate beam 3 may be in accordance with the construction disclosed in U. S. Patent No. 1,099,120, the beam comprising two oppositely arranged pairs ofpower cylinders 14 and 15 respectively, in which operate rams or pistons 16 supporting at opposite sides of the beam 8 wheel demounting heads17, 17. The beam 3 has at its forward side a transverse recess 18 for reception of the axle to which the wheels are attached so that the wheels lie outwardly of and in line with the heads 17 17. lVhen pressure is applied in the cylinders of the beam 3, the heads 17 are moved outwardly from opposite sides and exert pressure against the inner faces of the wheels so that the latter are pressed from the ends of the axle. A counterweight 19, or other suitable means, is provided for retracting the rams in the cylinder. The construction and operation of this portion of the present machine is fully described in the aforesaid U. S. patent, and requires no further description in this application.

In the present instance the pressure is applied to the various working cylinders by pumps 20 actuated through eccentrics 21 on a shaft 22, an electric motor 23 being the prime mover. The pumps are connected with the various cylinders and with a reservoir 24 for the actuating fluid, and valves 25 control the application of the fluid pressure to the cylinders. The present arrangement is such that the cylinders may be actuated independently.

In the operation of the demounting mechanism, it is the function of the beam 1 with its head 6 to abut one end of the axle while the other end is engaged by the head 12, which may be advanced as described above, to forcibly hold the opposite end of the axle against the head 6.

lVhen under these circumstances the heads 17, one or both, are forced outwardly against the wheels, the latter are pressed from their journals on the axle in obvious manner. To accommodate axles of different lengths, plugs 26 are provided in a variety of lengths which may be inserted between the heads 6 and 12 and the axle ends. In the present instance the plugs are suspended from trolleys 27 which travel on tracks 28 on the beams 1 and 2 respectively.

By providing yokes 29, which may be supported against the faces of the heads 6 and 12, by the same trolleys 27, which support the plugs 26, the mechanism is adapted for mounting wheels upon the axles as well as for deinounting them. In the mounting operation, the axle with wheels loosely applied is rolled upon platforms 30, 30, secured to the heads 1'? and supported on wheels or carriages 81 movable longitudinally of the tie rods 5, so that the axle occupies the recess 18, in alignn'ient with the open ends of theyokes29. The ram in cylinder 11 is then actuated to advance the head 12 and the yoke 29 which it engages so that the outer edges of the two yokes respectively engage the outer faces of the wheels. Continued pressure in thecylinder 11 advances the head 12 and "forces the wheels onto their seats uponthe axle. lt will be apparent that the inward movement oi the wheels on the axle islin'iited by the depth of the yokes 29, the outer ends of the shaft engaging the abutments or inner faces of the yokes and thereby preventing further pressure against the wheels. The head 12 is then withdrawn and pressure applied to the piston within the cylinder 7 to advance the stem S which engages the end of the axle ant. shifts the entire wheel assembly to the right until the fiange of the left hand wheel clears the outer end of the yoke, after which the wheel assembly may be rolled from the platform. T he yokes may be constructed so as to permit the insertion of suitable stops to vary the effective depth 01 the yoke.

In the present instance, the yokes are provided with transverse slots 82 for reception of stops 33. See Figs. i and 5. It will be apparent that the abutment 6 on the beam 1 and the movable abutment 12 on the beam 2 function actively not only in the wheel mounting but also in the wheel demounting oper tions, in one instance bearing against the ends of the shaft to hold the latter in fixed position during the demounting operation, and in the other case to exert pressure in the wheels tending to force them onto the shatt. It will further be noted that the machine is adapted either to mount or demount wheels withoi'it adjustment in the position out the axle in the machine, and with no change. other than those involved in the use of the plugs 26 and the yokes 29 to suit the particular operation in hand.

Operation of the machine will be more readily understood from the diagrammatic views of Figs. 6 and 7. In the first of these figures, the machine is set up and adjusted for removal of the wheels from the axle. It will be noted thatplugs 26 are clamped between the axle ends and the heads 6 and 12 which makes possible the simultaneous dismounting of both wheels. Obviously the wheels may be dismounted separately if desired.

In Fig. 7, the machine is set up fora wheel mounting operation. In the instance illustrated a stop 3Shas been inserted in the yoke 29 at the right which forms an abutment for that end of the axle and prevents the yoke frombearing in onthe wheel. The yoke at the left is effective, however, to mount the wheel and this may be accomplished by advancing the head 12 in the manner described. Bemoval oil? the stop 33 from the yoke on the right will result in the mounting of both wheels. It will bev apparent that provision is made for mounting either wheel separately, or bothin a single continuous operation.

I claim:

1. Ina wheel mounting and demounting press, the combination with means for supportingan axle and wheels in predetermined positions, of means providing a relatively fixed abutment for one end of the axle, a power actuated ram adapted to engage the opposite end of the axle to clamp the axle against the said abutment, power actuated rams positioned intermediate the said abutment and the first ram and adapted to engage the inner faces of the wheels to force the latter outwardly from the axle journals, yokes adapted to be positioned intermediate the abutment and the first-mentioned ram and the ends of the axle respectively so as to engage the outer faces of the wheels without engaging the axle'whereby the pressure of said first mentioned ram may be utilized for forcing the wheels inwardly onto the axle journals, and means operating in conjunction with said yokes for limiting the inward movement of said wheels on the axle.

2. In a wheel mounting and demounting press, the combination with means for supportingan axle andwheelsin predetermined positions, of means providing a relatively fixed abutment for one end of the axle, a power-actuated ram-adapted to engage the opposite end of the axle to clamp the axle against the said abutment, power-actuated rams positioned intermediate the said abutment and the first ram and adapted to en.-

gage the inner Faces of the wheels to :torcethe latter outwardly from the axle journals, and hollow yokes adapted to be positioned inter mediate the abutment and the first-mentioned ram and the respective ends of the axle so as to receive the axle ends and to engage the outer faces of the wheels whereby the'pressure of said first-mentioned ram may be utilized for forcing the wheels inwardly onto the axle journals, said yokes being transversely slotted and stop elements insertable in said slots to vary the eilective depth of said yokes and to thereby regulate the inward movement of said wheels on the axle.

3. In a wheel mounting and demounting press, the combination with means for supporting an axle and wheels in predetermined positions, of: means providing a relatively fixed abutment forone endoi the axle, said abutment being aperturecha power-operated plunger operating through said aperture to engage the endof the axle to force the latter away from the abutment, a power-actuated ram adapted to engage the opposite end of the axle to clamp the axle against the said abutment, removable means adapted for operation in conjunction With the abutment and With the said ram for engaging the outer faces of the said Wheels to exert through the medium of said ram a direct pressure tending to force the Wheels inwardly onto the axle journals, and oppositely movable power-actuated rams arranged to engage the inner faces of the Wheels to force the latter outwardly from the said journals.

WILLIAM HERBERT DERBYSHIRE, Jr. 

